Hoisting apparatus.



1. F. O'CONNOR.

HOlSTING APPARATUS. LPPucmoh men AUG-17,1914.

Patented May 15, 1917.

3 SHEETS-SHE I.

WITNESSES:

J. F. OCONNOR.

HOlSTlNG APPARATUS.

APPLICATION FILED AuG.n.1914.

Patented May 15 1917 3 SHEETS-SHEET 2 lllllllllilllllllll m:

11v VENTOR J. F. O'CONNOR. HO'ISTING APPARATUS.

APPLICATION FILED AUG. 17. l9l4.

1,2Q6,57 u Patented May15, 1917,

3 SHEETS-SHEET 3.

llllll H III IN VEN TOR.

WITNESSES:

roe r. o'oomioa, or CHICAGO, ILLINOIS, assrenon 'ro I LIAM H. MINEm- OF cnazr, new YoaK.

- HOISTING APPARATUS.

Application filed August 17, 1914.. Serial No. 857,105.

of which the following is a'tull, clear conelse, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in hoisting apparatus.

An object of the invention is to provide a hoisting apparatus of few parts simply arranged and so constructed that it is automatically self-locking in position.

Another object of the invention is to provide a hoisting apparatus employingdifierential gearing in which the winding drum and pinions are mounted on the sameshaft to thereby produce a compact structure.

@ther objects of the invention will appear from the description hereinafter given.

in the drawings forming a. part of this specification, Figure 1 is a side elevation of one form of hoisting apparatus embodying my improvements and showing the position of the same as it would be attached to a vertical post or side of a building; Fig. 2 is a vertical diametrical sectional view taken substantially on line 22 of Fig. v1; and Fig. 3 is a transverse sectional view taken substantially on line 3 3 of Fig. 2.

In said drawing, 10 denotes a bracket suitable for supporting the hoisting apparatus proper, said bracket 10 comprising a rear vertical wall 11 adapted to be secured to a post or pillar 12 by means of bolts or other suitablefastening devices 13. Said bracket 10 also has two spaced forwardly extended arms 1414, each of which is provided with a bearing 15, the latter having mounted therein a square operatingshaft 16, the lat-' ter being provided with suitable bushings 17 fittin the shaft 16 and also the bearings 15. The giaft 16 has secured thereto, outside of the bearings 15, collars 1818, the latter'being held in position by set-screws 19-19. The shaft16 may be rotated by any suitable means, such as 9 crank arm indicated in dotted lines at 20 in Fig. 2. At its central portion the shaft 16 is fitted with another 'bushing 21 which serves as a bearing for the hub 22 formed integrally with the winding drum 23, the latter having a central spider Specification of Letters Patent.

Patented May as, rent.

24 connecting it with the hub 22. lhe drum 23 is also providedwith peripheral flanges 25, to one of which is attached a screw-eye 26by whichthe end of the cable or rope be ing Wound upon the drum can be attached thereto. Each end. of the drum 23 is provided with a large, internal annular gear 27 ,see Figs. 1 and 3. Mounted within the annular gears 27 are pinions 28, the pinions 28 being of slightly less diameter than the pitch diameter of the gears 27 and having a less number of teeth. In actual practice, the pinions 28 will or may be provided with forty-eight teeth, whereas the gears 27 will have 51 teeth. Each pinion 28 is mounted on an eccentric 29 fixed to the shaft 16, the eccentrics 29 being disposed at substantially 180 degrees apart so that, as shown from Figs. 1 and 3, the pinion at one end of the drum will be in engagement with its coiiperating gear 27 at the bottom, and the other pinion 28 will be in engagement with its corresponding gear 27 at the top, and this 180-degree relation will be maintained at all the pins at the opposite end of the drum being arranged in horizontal alinement, as shown in Fig. 1. The pins engage in holes or recesses 32 formed in the pinions 28, the holes or recesses 32 being sufliciently large to permit the pinions to accommodate themselves during their movements caused by the rotation of the cams 29-29.

From the preceding description, it is believed that the operation will be clear, it being evident that as the, crank arm 20 is rotated, the points of engagement between the pinions and gears will travel in a circle around the gears, and inasmuch as there are fewer teeth on the pinions than on the gears, the drum will be advanced or moved revolution of the shaft 16, so that seventeen rotations of the shaft 16 will rotate the winding drum one complete revolution. As will be obvious, the ratio of teeth in the differential gearing maybe varied as desired, depending upon the work to be performed by the hoisting apparatus. It will furthermore be observed that the device is self-locked in whatever position the parts may be left in, thus doing away with the necessity for dogs, latches or other com-" be made in the details and arrangements without departing from the spirit of the invention, and all such changes and modifications are contemplated as come within the scope of the claim appended hereto.

precaution in operating the 7 I claim ln mechanism of the character described,

the combination with a supporting member 7 having a pair of spaced, integral, outstanding arms, each arm having a'bearing therein, of a winding drum mounted between said arms, said drum having internal gears at each end thereof and a centrally located bearing, pinions of lesser pitch diameter than said gears and cooperable therewith, said pinions being bodily movable but nonrotatable and relatively angularly displaced 180 degrees,,eccentrics on which said pinions are mounted, an operating shaft removably extended through said bearings in said arms through said eccentrics, and through said bearing on the drum, said eccentrics being rotatable with said shaft, and pins carried by said arms and extending into slots in the pinions for preventing rotation of the latter.

' JOHN F. OCONNOR.

Witnesses:

CARRIE G. RANZ, ARLINE R. ARNOLD. 

